Air cleaner and silencer assembly



Oct. 15, 1940..

A. F. BAILLIO AIR CLEANER AND SILENCER ASSEMBLY Patented Oct. l5, 1940UNITED, STATES PATENT OFFICE 2,217,8: y am oLEaNEa AND slLENcER ASSEMBLYApplication August 10, 1938, Serial No. 224,145

4 Claims. This invention has for its principal object to provide an aircleaner and -silencer assembly in which the elements are so constructedand arranged as to minimize the height of the assembly and to make it inall respects as compact as possible.

The invention is primarily concerned with assemblies of liquid bath typeair cleaners and re-V sonator silencers and to the end mentioned aboveI0 I construct and arrange the air cleaner and the silencer so that oneencircles the other.

For a better understanding of the nature and objects of this invention,reference is made to the following specification wherein are described lthe preferred embodiments of the invention which are illustrated in theaccompany drawing.

In the accompanying drawing:

Figure 1 is a view, mainly in vertical section, of a liquid bath typeair cleaner and resonator *o silencer assembly in which the air cleanerencircles the silencer.

Figure 2 is a view, similar to Figure 1, of a liquid bath type aircleaner and resonator silenced assembly in which the silencer encirlesthe air g5 cleaner.

The assembly shown in Figure 1 includes a member I0 shaped generallylike a shallow circular bowl. Within the bowl-like vmember III there isdisposed coaxially with it a cylindrical :In shell II whose lower end isseated on and welded or otherwise suitably secured to the bottom of thebowl-like member. 'I'he cylindrical shell and the -bowl-like member denean annular reservoir which is lled with oil or some other suitable 35liquid I2 to about the level indicated. in the drawing before theassembly is put into use.

Over the upper end of the cylindrical shell II there is secured a headI3 with an oriilce in it which is coaxial with the cylindrical shell andin m which there is secured a tube I4 which extends well toward but endsshort of the bottom of the bowl-like member Ill. In an orice in thebottom of the bowl-like member I0 within the connes of the cylindricalshell I I and coaxial with theoriiice 5 in the head I3 there is secureda tube I5 which is of larger diameter than the tube I4 and extendstoward but ends short of the head I3 and encircles but is spaced fromthe lower end of `the tube I4 by an annular aperture I6. The compart- 50ment dened by the shell I I, the tubes. and I5,

the head I3 and the portion of the bottom of the bowl-like memberx I0within the confines oi the shell II which communicates through theaperture; I gwithithe duct 'dned by the tubes I'land 55 I5'thro'glrzwhich air leaves the assemblyissubf,

divided into two chambers II and I3 by 'a partltion I9 `through whichextends atube 20 which establishes communication between the chambers.'I'he chambers I1 and I3 and the tube 20 and the aperture I6, of course,constitute a compound l resonator. l

Between the cylindrical shell II and the side wall of the bowl-likemember I'II there is disposed an annular lter 2| which consists of anannular shell 22 lled `with a suitable air ltering medium l0 '23 whichis wetted with the liquid I2. The inner and outer wallsof the annularshell 22 are imperforate but there are in its lower wall air inletoriilces 24 and in its. upper wall air outlet oriilces 25 from which airpassestoward the upper end of ll the duct I4-I5. 'I'he inner wall of theannular shell fits snugly around the cylindrical shell I I but the outerwall thereof is spacedv from the side wall of the bowl-like member IIIto dene a passage through which air travels from the atmosa0 pheretoward the air inlet oriilces in the lter. The lter is supported withits lower wall spaced` above the liquid level in the reservoir to dene apassage through which air travels from the passage between the side wallof the bowl-like member I0 and the outer wall of the lter to the airinlet orifices in the lter by a step 26 in the cylindrical shell I I onwhich the lower end of the inner wall of the filter is seated.

On the outer edge of the filter there is seated a so cover 21 which islined with a sound absorbent 28 and closes the upper ends of the lterand the duct I4-I 5 to the atmosphere but is spaced from the latter andfrom the former except at its outer edge so that air may pass from theorices 25 into 35 the upper end of the duct Il-I 5.

The assembly shown in Figure `2 includes a member 30 which is similar tothe member I0 and has an orifice in the center of its bottom in whichthere is secured a tube 3l which extends into the 40 bowl-like member 30to about the level of the up per edge of its side wall. 'I'he tube 3|through which air leaves the .assembly defines with the bowl-like member30 an annular reservoir which is filled to about the level indicated inthe drawing 5 with oil or some other suitable liquid I2 before theassembly is put into use. 'I'he tube 3| is encircled by an annularfilter 32 which does not diner materially from the filter 2l except insize and in that its outer wall is oifset inwardly about midway betweenits lower and upper ends and the portion above the offset is curvedinwardly andupwardly and riddled with perforations 33:17'Ifhe illter 32is supported with its lower wall above th'liqliid'level intheannularreservoir by an annular dementie-66. f

` pends from the inner edge of the upper wall of lil the annular shelland whose upper part follows closely the contour of but is spaced fromthe upper portion of the outer wall of the filter to dene an aperture'land a member 38 which projects upwardly from the inner edge of the lowerwall of the annular shell and iits snugly around the lower portion ofthe outer Wall of the lter and overlaps but is spacedv outwardly fromthe lower edge of the member 36 by a continuation of i the aperture 3l.The annular shell 35 is supported from the iilter 32 with its outer sideWall spaced from the side wall of -the bowl-like member 3b and its lowerwall spaced above the liquid level in the annular reservoir to denne apassage through which and the space between the lower wall of the lterand the liquid level in the annu...

lar reservoir air passes from the atmosphere into the air inlet orificesin the lower wall of the filter by a lip 39 on the member 38 which isseated o'n the` step in the outer wall of the filter.

On the outer-edge of the annular shell 35 there is seated a cover Allwhich is similar to the cover 2T and closes the upper end of theaperture 3l, the air outlet oriiices in the upper wall of the lter andthe upper end of the tube 3l to the atmosphere but is spaced from themso that air can pass from the air outlet orifices in the upper wall'ofthe lter into the upper end of the tube and the aperture 3l communicates`with this passage. The interior of the annular shell 35 whichcommunicates, besides as I have intimated with the passage between theair outlet orifices in the upper wall of the lter andthe upper end ofthe tube 3| through the aperture 31, with the interior of the filterthrough the aperture 31 and the perforations 33 is subdivided into twochambers 4l and 44 by a partition 42I through which extends a tube 43which establishes communication between the chambers. The chambers 4iand 44 and the tube 43 and the aperture 31 and vto and 3l connected tothe air intake tubes of the.

The path of travel of air through carburetors. the assemblies has beenindicated in the'foregoing descriptionand since individually the aircleaners and silencers included in the assemblies are of well knowntypes further description of the mode of operation of the assembliesappears .un-

necessary-it being understood,of course,that the resonators l1-20 |8-I6and 4I--43-44--31- 33 are to be so tuned that they will respond to andattenuate by resonance preselected objectionable sound waves in theintake noises of the vengines on which the assemblies are installed.Both of the assemblies, of course, represent realizations of the objectsof invention previously set forth and both do `substantially the samething in substantially the same way but it is, of course, apparent thatthe assembly shown in Figure 1 has the greater air cleaning capacity andthe assembly shown in Figure 2 the greater silencing capacity. It will,of course, be underl stood that in neither of the assemblies is itnecessary to locate the outer neck of the resonator in the wall in whichit is shown. For example,- in

either of the assemblies, the outer neck may be located in the outerinstead of the inner Wall 5 of the resonator. In the case of theassembly shown in Figure 1, this location of the outer neck will make itpossible to use it, as the assembly shown in Figure 2 may be usedwithout 1re-locating the outer.neck of the resonator included in it,with an outlet duct which opens into it through its cover instead ofthrough its bottom.

I claim: 1. In an appliance of the type disclosed, a bowllike memberashell which is disposed within the 5 bowl-like member with its loweren'd seated on the bottom thereof and denes with the bowllike member anannular liquid reservoir', means, including a duct whichextendsitln'ough the shell and the bottom of the bowl-like member andthrough which air leaves the appliance, which with the shell defines asound wave attenuating compartment which communicates with the duct as aside branch, ani annular filter l with air inlet and outlet orifices inits lower and upper walls which is disposed within the bowllike memberand encircles the shell with its outer sideand lower walls spaced fromthe side and bottom walls of the bowl-like memberto deiine apassagethrough which air travels from the atmosphere to the air inlet orificesin the lower wall of the filter, and a cover which closes the air outletorices in the upper wall of the lter and the upperend of the duct to theatmosphere but does not prevent air traveling from lthe former, into thelatter.

2. In an appliance lof the type disclosed, a member which is shapedgenerally like a bowl and has in its bottom near its outer edge a poolof liquid, a tubular member which extends 4" shaped member and encirclesand is radially`4f spaced from the tubular member and defines with thelatter a sound wave attenuating compartment which communicates with theduct as a side branch, a filter member with air inlet and outletoriiicesin it near its lower and upper ends dis- 4' posed within thegenerally bowl-shaped member around the sound wave attenuatingcompartment and above the poolof liquid in the bottom of -the generallybowl-shaped member with its outer wall spaced from the outer side wallof the generallybowl-shaped member to define with it a passage 'throughwhich air travels from the atmosphere to the air inlet orifice in thelter member, and a cover which closes the air outlet orifice ,in thefilter member and the upper end of the tubular member to the atmosphereand constitutes a wall of a passage through which air travels from theformer into the latter.

' 3. In an appliance of the type disclosed, a member which is shapedgenerally likea. bowl and has in its bottom near its outer edge a poolof liquid, a tubular member which constitutes the ,n duct through whichair leaves the appliance, a

generally cylindrical wall'which is disposed with- 70 :a lter'memberwith air inlet and. outlet oriiicas 7|.

in it near its lower and upper ends disposed witha sound waveattenuating 4compartment', which in the generally bowl-shaped memberaround the sound wave attenuating compartment and above the pool ofliquid in the bottom of the generally bowl-shaped member with its outerwall spaced from the outer side wall of the generally bowlshaped memberto vdefine with it a passage through which air travels from theatmosphere 20 in the generally bowl-shaped member and denes communicatesas a side branch with the passage through which air travels through theappliance,`

a filter member with air inlet and outlet orices in it near its lowerand upper ends carried by the sound wave attenuating compartment anddisposed wlthin the generally bowl-shaped member around the sourd waveattenuating compartment and above. the pool of liquid in the bottom ofthe generally bowl-shaped member with its outer wall spaced from theouter side wall of the generally bowl-shaped member to dene with it apassage through which air travels from the atmosphere to the air inletorice in the iilter member, and `a cover which closes the air outletorifice in the lter member to the atmosphere and constitutes a. Wall ofa passage through which air travels from it into the tubular member.

ALEXANDER F. yBAILLIO.

